CN108784360B - Coffee machine brewing structure with fool-proof function - Google Patents
Coffee machine brewing structure with fool-proof function Download PDFInfo
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- CN108784360B CN108784360B CN201810851886.9A CN201810851886A CN108784360B CN 108784360 B CN108784360 B CN 108784360B CN 201810851886 A CN201810851886 A CN 201810851886A CN 108784360 B CN108784360 B CN 108784360B
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- sealing
- machine
- coffee
- annular
- fool
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- 235000013353 coffee beverage Nutrition 0.000 title claims abstract description 118
- 238000007789 sealing Methods 0.000 claims abstract description 154
- 239000002775 capsule Substances 0.000 claims abstract description 70
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 238000003825 pressing Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 5
- 238000009835 boiling Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 239000013505 freshwater Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J31/00—Apparatus for making beverages
- A47J31/06—Filters or strainers for coffee or tea makers ; Holders therefor
- A47J31/0657—Filters or strainers for coffee or tea makers ; Holders therefor for brewing coffee under pressure, e.g. for espresso machines
- A47J31/0668—Filters or strainers for coffee or tea makers ; Holders therefor for brewing coffee under pressure, e.g. for espresso machines specially adapted for cartridges
- A47J31/0673—Means to perforate the cartridge for creating the beverage outlet
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J31/00—Apparatus for making beverages
- A47J31/002—Apparatus for making beverages following a specific operational sequence, e.g. for improving the taste of the extraction product
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Apparatus For Making Beverages (AREA)
Abstract
The invention relates to a brewing structure of a coffee machine with a fool-proof function, which comprises a first machine part and a second machine part which are arranged in a machine seat and can be mutually close to and far away from each other, wherein a brewing chamber for accommodating a coffee capsule with an annular groove on a sealing end surface and a coffee outlet channel communicated with the brewing chamber are arranged in the first machine part; the method is characterized in that: the second machine member is internally provided with a sealing part, the sealing part is internally provided with a hot water inlet channel, the sealing part is provided with a concave part, the periphery of the concave part forms an annular sealing pressing edge, the middle part in the concave part is provided with a plurality of limit bars, the concave part is internally fixed with a sealing ring, the sealing ring is positioned in a space surrounded by the limit bars and forms a seal with the periphery of a puncture position of the coffee capsule, and the sealing part is provided with a waste discharge hole communicated with the concave part positioned at the periphery of the limit bars and the outside of the second machine member. The brewing structure of the coffee machine with the fool-proof function is reasonable in structural design and can only brew coffee capsules with annular grooves on the sealing end surfaces.
Description
Technical Field
The invention relates to a coffee machine, in particular to a brewing structure of a coffee machine with a fool-proof function.
Background
The heating system and the brewing system are two main components of the coffee machine, the heating system generally comprises a water tank, a heating element, a water pump and the like, the brewing system comprises a fixed part and a movable part, a puncture needle is arranged on one of the fixed part and the movable part, the puncture needle is directly fixed with the part, the movable part is driven by a driving structure to slide relative to the fixed part, a brewing cavity is formed after the fixed part and the movable part are folded, a coffee capsule is positioned in the extraction cavity during brewing, heated water is pumped into the extraction cavity during extraction, water flows through a coffee raw material to be extracted, and a coffee beverage flows into a cup from a water outlet pipe of the coffee machine.
The buying of a capsule delivering coffee machine is a marketing mode of a coffee capsule producer, most of the existing coffee machines have no foolproof function (i.e. the coffee machine can be matched with coffee capsules produced by various factories), which leads to that after consumers purchase the coffee capsules produced by the factories in advance, the consumers do not need to select the coffee capsules produced by the factories later due to the universality of the coffee machine. To prevent this, some coffee capsule manufacturers produce specially structured coffee capsules, and their associated coffee machines are also designed so that they are only suitable for use with coffee capsules of this type.
At present, a coffee capsule is designed by a manufacturer, an annular groove is arranged on the sealing end face of the coffee capsule, and a puncturing position is positioned in the sealing end face of the coffee capsule surrounded by the groove. How to design a coffee machine which can only brew the coffee capsule and ensure that the coffee machine can not extract other coffee capsules normally is a technical problem which needs to be solved by the person skilled in the art.
Disclosure of Invention
The invention aims to solve the technical problem of providing a brewing structure of a coffee machine with foolproof function, which is reasonable in structural design and can only brew coffee capsules with annular grooves on the sealing end surfaces.
The technical scheme adopted for solving the technical problems is as follows: a brewing structure of a coffee machine with fool-proof function comprises a first machine part and a second machine part which are arranged in a machine seat and can be mutually close to and far away from each other, wherein a brewing chamber for accommodating a coffee capsule with an annular groove on a sealing end surface and a coffee outlet channel communicated with the brewing chamber are arranged in the first machine part; the method is characterized in that: the coffee machine comprises a first machine part, a second machine part, a sealing ring and a sealing part, wherein the sealing part is used for forming sealing fit with the sealing end face of a coffee capsule, a hot water inlet channel is arranged in the sealing part, a concave part is arranged on the end face, opposite to the first machine part, of the sealing part, an annular sealing blank matched with the annular edge of the coffee capsule in a pressing mode is formed on the periphery of the concave part, a plurality of protruding limiting strips used for being inserted into the annular groove of the coffee capsule are arranged in the middle of the concave part, the limiting strips are arranged at intervals along the circumference, the sealing ring is fixed in the concave part of the sealing part, the sealing ring is located in a space surrounded by the limiting strips and forms sealing with the periphery of a puncture position of the coffee capsule, the sealing ring is exposed out of an outlet of the hot water inlet channel, and a waste discharge hole communicated with the concave part located on the periphery of the limiting strips and the outer part of the second machine part is formed on the sealing part.
As an improvement, the limit bars are four, wherein the height of two limit bars which are oppositely arranged is larger than that of the other two limit bars which are oppositely arranged. Because the limit strips have height differences, when the coffee capsules without the annular grooves are encountered, the extracted coffee beverage can flow out through the waste discharge holes through the space between two adjacent limit strips and also can flow out through the waste discharge holes after passing through the fall space.
The sealing ring is pressed and fixed in the concave part of the sealing component by a fixing nut in threaded connection with the threaded hole, and the fixing nut is provided with a perforation. This structure facilitates fixing the seal ring to the seal member.
Further improved, the sealing ring is provided with an outer ring part, the inner end of the outer ring part is provided with an annular pressing edge extending inwards, the outer end of the outer ring part is provided with an annular sealing surface extending inwards and used for forming a seal with the periphery of a puncturing position of the coffee capsule, the annular sealing surface is conical, and the annular pressing edge is pressed and fixed in a concave part of the sealing part by the fixing nut. The sealing ring structure can form a sealing cavity with the fixing nut and the sealing end face of the coffee capsule, and after water flows into the sealing cavity, certain pressure is generated by coffee powder filled in the coffee capsule, and the pressure pushes the annular sealing surface on the sealing ring to be pressed more tightly with the sealing rib on the sealing end face of the periphery of the puncture position. The sealing ring is thus better with the coffee capsule when the water pressure is greater.
The sealing device is in a hydraulic driving sealing mode, the first machine part is a fixed part arranged at the front part of the machine base, the second machine part is a movable part arranged at the rear part of the machine base, the second machine part is provided with a piston cavity and a water inlet hole communicated with the piston cavity, the sealing part is restrained in the piston cavity and can slide, a first sealing ring is arranged between the periphery of the sealing part and the inner annular wall of the piston cavity, and a one-way valve assembly which only allows hot water to enter the hot water inlet channel from the piston cavity is arranged in the hot water inlet channel.
In order to enable the brewing structure to have the function of boiling clear water, the side wall of the first machine member is provided with a clear water outflow hole communicated with the brewing chamber and the outside of the first machine member, and when the coffee capsule is not placed in the brewing chamber and the first machine member and the second machine member are folded, the annular sealing blank on the sealing member can be pressed tightly with the front end surface of the first machine member to form a seal by the forward movement of the sealing member. Because no back pressure exists when the clear water is boiled, the sealing component and the brewing chamber achieve sealing effect through end surface matching, the water in the hot water inlet channel of the sealing component is discharged, and the clear water passing through the brewing chamber flows into the cup through the clear water outflow hole.
The sealing mechanism is in a sealing mode driven by a connecting rod, the second machine part is a fixed part arranged at the front part of the machine base, the sealing part is fixed on the second machine part, and the first machine part is a moving part arranged at the rear part of the machine base.
In order to enable the brewing structure to have the function of boiling clear water, the side wall of the first machine member is provided with a cleaning water outflow hole communicated with the brewing chamber and the outside of the first machine member, the periphery of the sealing member is provided with a second sealing ring used for forming a seal with the inner annular wall of the brewing chamber, and when the coffee capsule is not placed in the brewing chamber and the first machine member and the second machine member are folded, the sealing member partially stretches into the brewing chamber and forms a seal with the inner annular wall of the brewing chamber through the second sealing ring on the sealing member. Because no back pressure exists when the clear water is boiled, the periphery of the sealing component and the brewing chamber are matched through the second sealing ring to achieve the sealing effect, the water in the hot water inlet channel of the sealing component is discharged, and the clear water flowing through the brewing chamber flows into the cup through the clear water outflow hole.
Compared with the prior art, the invention has the advantages that: the brewing structure is specially used for brewing the coffee capsules, wherein the annular groove is formed in the sealing end face of the coffee capsule, and the puncturing position of the annular groove is positioned in the sealing end face of the coffee capsule surrounded by the groove. The sealing part is provided with a plurality of protruding limit strips which are used for being inserted into the annular groove of the coffee capsule, the limit strips are arranged at intervals along the circumference, a sealing ring is fixed in the concave part of the sealing part, the sealing ring is positioned in a space surrounded by the limit strips and forms sealing with the periphery of the puncturing position of the coffee capsule, and the sealing part is provided with a concave space communicated with the periphery of the cutting and a waste discharge hole outside the second machine part. When the coffee capsule is used for brewing coffee, the limit strips can sink into the annular grooves, the sealing rings and the peripheries of the puncture positions form sealing, hot water enters the coffee capsule through the hot water inlet channels and the puncture positions, and the sealing of the sealing rings ensures that coffee beverage cannot enter the concave parts outside the limit strips, and the coffee beverage can only flow into the cup through the coffee outlet channels; if other imitative or similar coffee capsules are used, the limiting strips can prop against the sealing end surfaces of the coffee capsules to form gaps, and the sealing rings can achieve the effect of sealing failure when other similar coffee capsules are used, so that coffee water directly flows out to the garbage box outside the second machine part through the gaps between the two adjacent limiting strips and then through the waste discharge holes, and coffee cannot be brewed. Eventually, it is achieved that coffee cannot be brewed when other capsules of similar dimensions are used.
Drawings
Fig. 1 is a sectional view (coffee-making state) of a first embodiment of the present invention;
FIG. 2 is a schematic perspective view of a second mechanism in a first embodiment of the invention;
FIG. 3 is a cross-sectional view of a second work in a first embodiment of the invention;
FIG. 4 is a schematic perspective view of a seal member according to a first embodiment of the present invention;
FIG. 5 is a schematic perspective view of a seal ring according to a first embodiment of the present invention;
FIG. 6 is a schematic perspective view of a coffee capsule used in a first embodiment of the present invention;
fig. 7 is a sectional view (boiled water state) of a first embodiment of the present invention;
fig. 8 is a sectional view (coffee-making state) of a second embodiment of the present invention;
fig. 9 is a sectional view (boiled water state) of a second embodiment of the present invention;
fig. 10 is a schematic perspective view of a second mechanism according to a second embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
As shown in fig. 1-7, is a preferred embodiment of the present invention.
A brewing structure of a coffee machine with fool-proof function aims at a coffee capsule with a special structure, an annular edge 52 is arranged on the periphery of the coffee capsule 5, a sealing cover is fixed at the front end of the coffee capsule, the end face of the sealing cover forms a sealing end face 51, an annular groove 511 is arranged on the sealing end face 51, and a puncture position 53 of the coffee capsule is positioned in the sealing end face 51 of the coffee capsule surrounded by the annular groove 511.
Specifically, the brewing structure comprises a first machine member 2 and a second machine member 3 which are arranged in the machine base 1 and can be mutually close to and far away from each other, a brewing chamber 21 for accommodating a coffee capsule 5 with an annular groove 511 on a sealing end surface 51 and a coffee outlet passage 22 communicated with the brewing chamber 21 are arranged in the first machine member 2, and the coffee outlet passage 22 is provided with a one-way valve structure.
In this embodiment, the first machine member 2 is a fixed component disposed at the front of the base 1, the second machine member 3 is a movable component disposed at the rear of the base 1, the second machine member 3 has a piston chamber 31 and a water inlet 32 communicating with the piston chamber 31, the sealing member 6 is restrained in the piston chamber 31 and can slide, a first sealing ring 4a is disposed between the periphery of the sealing member 6 and the inner annular wall of the piston chamber 31, and a check valve assembly 64 is disposed in the water inlet channel 61 to allow only hot water to enter the water inlet channel 61 from the piston chamber 31. The side wall of the first machine member 2 is provided with a clear water outflow hole 23 which is communicated with the brewing chamber 21 and the outside of the first machine member 2, and when the coffee capsule 5 is not placed in the brewing chamber 21 and the first machine member 2 and the second machine member 3 are folded, the annular sealing pressing edge 621 on the sealing member 6 can be pressed tightly with the front end surface of the first machine member 2 to form a seal by the forward movement of the sealing member 6.
The second machine member 3 is internally provided with a sealing part 6 for forming sealing fit with the sealing end face 51 of the coffee capsule 5, the sealing part 6 is internally provided with a hot water inlet channel 61, the end face, opposite to the first machine member 2, of the sealing part 6 is provided with a concave part 62, the periphery of the concave part 62 forms an annular sealing blank 621 for performing compression fit with the annular edge 52 of the coffee capsule 5, the middle part in the concave part 62 is provided with a plurality of protruding limit strips 63 for being inserted into the annular groove 511 of the coffee capsule 5, the limit strips 63 are arranged at intervals along the circumference, the limit strips 63 are four, the limit strips 63 are arc-shaped, and the height of two limit strips 63 which are oppositely arranged is larger than the height of the other two limit strips 63 which are oppositely arranged. The concave part 62 of the sealing part is internally fixed with a sealing ring 7, the sealing ring 7 is positioned in a space surrounded by the limiting bar 63 and forms a seal with the periphery of the puncturing position 53 of the coffee capsule 5, the outlet of the hot water inlet channel 61 exposes the sealing ring 7, and the sealing part 6 is provided with a waste discharge hole 65 which is communicated with the concave part 62 positioned at the periphery of the limiting bar 63 and the outside of the second machine member 3.
The hot water inlet channel 61 is internally provided with a section of threaded hole, the sealing ring 7 is tightly pressed and fixed in the concave part 62 of the sealing component 6 by the fixing nut 8 which is in threaded connection with the threaded hole, and the fixing nut 8 is provided with a perforation 81. The sealing ring 7 has an outer ring portion 71, the inner end of the outer ring portion 71 having an inwardly extending annular bead 72, the outer end of the outer ring portion 71 having an inwardly extending annular sealing surface 73 for forming a seal with the periphery of the piercing location 53 of the coffee capsule 5, the annular sealing surface 73 being tapered, said annular bead 72 being pressed and fixed in the recess 62 of the sealing member 6 by the fixing nut 8.
As shown in fig. 8 to 10, a second embodiment of the present invention is shown.
The present embodiment differs from the first embodiment in that: the second machine member 3 is a fixed part arranged at the front part of the machine base 1, the sealing part 6 is fixed on the second machine member 3, and the first machine member 2 is a movable part arranged at the rear part of the machine base 1. The side wall of the first machine member 2 is provided with a clear water outflow hole 23 which is communicated with the brewing chamber 21 and the outside of the first machine member 2, the periphery of the sealing member 6 is provided with a second sealing ring 4b which is used for forming a seal with the inner annular wall of the brewing chamber 21, and when the coffee capsule 5 is not placed in the brewing chamber 21 and the first machine member 2 and the second machine member 3 are closed, the sealing member 6 partially stretches into the brewing chamber 21 and forms a seal with the inner annular wall of the brewing chamber 21 through the second sealing ring 4b thereon.
The targeted coffee capsule 5 is adopted to brew coffee, the limit strip 63 is sunk into the annular groove 511, the sealing ring 7 forms a seal with the periphery of the puncture site 53, hot water enters the coffee capsule 5 through the hot water inlet channel 61 and the puncture site 53, and the sealing of the sealing ring 7 ensures that coffee beverage cannot enter the concave part 62 outside the limit strip 63, and the coffee beverage can only flow into a cup through the coffee outlet channel 22; if other imitated or similar-sized coffee capsules are used, the limit strips 63 can prop against the sealing end face 51 of the coffee capsule 5 to form gaps, so that the sealing ring can achieve the effect of sealing failure when other similar-sized coffee capsules are used, and coffee water can directly flow out to the garbage box outside the second machine member 3 through the gaps between the adjacent limit strips 63 and then through the waste discharge holes 65, and coffee cannot be brewed. Eventually, it is achieved that coffee cannot be brewed when other capsules of similar dimensions are used.
Since there is no back pressure when boiling the fresh water, the sealing member 6 and the brewing chamber 21 achieve a sealing effect by the end surface fit, the water in the hot water inlet channel 61 of the sealing member 6 is discharged, and the fresh water passing through the brewing chamber 21 flows into the cup through the fresh water outflow hole 23.
It should be noted that, in the description of the present embodiment, the terms "front, rear", "left, right", "upper, lower", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention. The terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Claims (8)
1. A coffee machine brewing structure with fool-proof function comprises a first machine part (2) and a second machine part (3) which are arranged in a machine seat (1) and can be mutually close to and far away from each other, wherein a brewing chamber (21) for accommodating a coffee capsule (5) with a sealing end surface (51) and an annular groove (511) and a coffee outlet channel (22) communicated with the brewing chamber (21) are arranged in the first machine part (2); the method is characterized in that: the coffee machine is characterized in that a sealing part (6) used for forming sealing fit with a sealing end face (51) of the coffee capsule (5) is arranged in the second machine part (3), a hot water inlet channel (61) is arranged in the sealing part (6), a concave part (62) is formed in the end face, opposite to the first machine part (2), of the sealing part (6), an annular sealing pressing edge (621) used for being in pressing fit with an annular edge (52) of the coffee capsule (5) is formed on the periphery of the concave part (62), a plurality of protruding limiting strips (63) used for being inserted into the annular groove (511) of the coffee capsule (5) are arranged in the middle of the concave part (62), the limiting strips (63) are arranged at intervals along the circumference, a sealing ring (7) is fixed in the concave part (62) of the sealing part, the sealing ring (7) is located in a space surrounded by the limiting strips (63) and forms sealing with the periphery of a puncture position (53) of the coffee capsule (5), an outlet of the hot water inlet channel (61) reveals the sealing ring (7), and the sealing part (6) is provided with a plurality of protruding limiting strips (63) used for being inserted into the annular groove (511) of the periphery of the coffee capsule (5).
2. The coffee machine brew structure with fool-proof function of claim 1, wherein: the limiting strips (63) are four, wherein the heights of two opposite limiting strips (63) are larger than the heights of the other two opposite limiting strips (63).
3. The coffee machine brew structure with fool-proof function of claim 1, wherein: the inside of the hot water inlet channel (61) is provided with a section of threaded hole, the sealing ring (7) is tightly pressed and fixed in the concave part (62) of the sealing component (6) by the fixing nut (8) in the threaded hole, and the fixing nut (8) is provided with a perforation (81).
4. A coffee machine brew structure with fool-proof function according to claim 3, characterised in that: the sealing ring (7) is provided with an outer ring part (71), the inner end of the outer ring part (71) is provided with an inward extending annular pressing edge (72), the outer end of the outer ring part (71) is provided with an inward extending annular sealing surface (73) used for forming a seal with the periphery of the piercing position (53) of the coffee capsule (5), the annular sealing surface (73) is conical, and the annular pressing edge (72) is pressed and fixed in the concave part (62) of the sealing part (6) by the fixing nut (8).
5. The coffee machine brew structure with fool-proof function of claim 1, wherein: the first machine part (2) is a fixed part arranged at the front part of the machine base (1), the second machine part (3) is a movable part arranged at the rear part of the machine base (1), the second machine part (3) is provided with a piston cavity (31) and a water inlet hole (32) communicated with the piston cavity (31), the sealing part (6) is restrained in the piston cavity (31) and can slide, a first sealing ring (4 a) is arranged between the periphery of the sealing part (6) and the inner annular wall of the piston cavity (31), and a one-way valve assembly (64) which only allows hot water to enter the hot water channel (61) from the piston cavity (31) is arranged in the hot water inlet channel (61).
6. The coffee machine brew structure with fool-proof function of claim 5, wherein: the side wall of the first machine member (2) is provided with a clear water outflow hole (23) communicated with the brewing chamber (21) and the outside of the first machine member (2), and when the coffee capsule (5) is not placed in the brewing chamber (21) and the first machine member (2) and the second machine member (3) are in a folded state, the annular sealing pressing edge (621) on the sealing member (6) can be pressed tightly with the front end surface of the first machine member (2) to form a seal by the forward movement of the sealing member.
7. The coffee machine brew structure with fool-proof function of claim 1, wherein: the second machine part (3) is a fixed part arranged at the front part of the machine base (1), the sealing part (6) is fixed on the second machine part (3), and the first machine part (2) is a movable part arranged at the rear part of the machine base (1).
8. The coffee machine brew structure with fool-proof function of claim 7, wherein: the side wall of the first machine member (2) is provided with a clear water outflow hole (23) which is communicated with the brewing chamber (21) and the outside of the first machine member (2), the periphery of the sealing component (6) is provided with a second sealing ring (4 b) which is used for forming a seal with the inner annular wall of the brewing chamber (21), and the sealing component (6) partially stretches into the brewing chamber (21) and forms a seal with the inner annular wall of the brewing chamber (21) through the second sealing ring (4 b) on the sealing component under the state that the coffee capsule (5) is not placed in the brewing chamber (21) and the first machine member (2) and the second machine member (3) are folded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810851886.9A CN108784360B (en) | 2018-07-30 | 2018-07-30 | Coffee machine brewing structure with fool-proof function |
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| CN201810851886.9A CN108784360B (en) | 2018-07-30 | 2018-07-30 | Coffee machine brewing structure with fool-proof function |
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| CN108784360A CN108784360A (en) | 2018-11-13 |
| CN108784360B true CN108784360B (en) | 2023-10-31 |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108784360A (en) | 2018-11-13 |
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